Suscribing to array changes using the new arraychange subscriptions in knockout 3.0

arraysubscriptions.js

    //....
    //....
    
    target.getChanges = function () {
        var result = {
            added: target.added(),
            removed: target.removed()
        };

        return result;
    };
    
    target.subscribe(function(changes) {
        ko.utils.arrayForEach(changes, function (change) {
            switch (change.status)
            {
                case "added":
                    addItem(change.value);
                    break;
                case "deleted":
                    removeItem(change.value);
                    break;
            }
        });
    }, null, "arrayChange");
}